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Methods to fuel proof firewall - 12/22/2001 8:36:24 PM   
RCadmin



Posts: 13181
Joined: 11/28/2001
From: Belle Mead, NJ, USA
Status: offline 		Any tips on fuelproofing those firewalls? What's the best thing to use? I've used epoxy (usally not thinned) spread on thin with a a credit card to get a thin coat. Probably overkill. I see some thin it with a few drops of alcohol and paint it on for less wait and better coverage. How about fuelproof dope? What do the ARF manufacturers seem to use?

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FireWall - 12/22/2001 9:25:52 PM   
Miniair



Posts: 155
Joined: 11/29/2001
From: Medicine Hat, Alberta
Status: offline 		I still use epoxy but thin it with 99% pure rubbing alcohol - about 25-30% alcohol. Still seems to work the best.

Fuel proof dope will work as well and you can get a fairly good colour match with your covering colour.

Another thing I've tried is varathane, not the Diamond as it's not fuel proof. Seems to work not too bad but I have found if you get a scratch in it down to the wood the the fuel will work under it and lift it.

CA has been used but I have seen fuel soaked fire wall that have been soaked with CA to fuel proof the firewall.


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Methods to fuel proof firewall - 12/22/2001 11:55:12 PM   
maverick



Posts: 1575
Joined: 11/29/2001
From: Alameda, CA, USA
Status: offline 		I have always used epoxy thinned with alcohol. However I have heard of another technique that I am going to try next time and that is using epoxy and then running a heat gun over it to heat it and thin it out.

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Fuel Proofing - 12/24/2001 1:13:02 AM   
Miniair



Posts: 155
Joined: 11/29/2001
From: Medicine Hat, Alberta
Status: offline 		Yes I've done it with a heat gun. I found that it was handy especially if you had your covering wraped around onto the firewall or even the sides pulled into the engine area. It did a fine job of sealing the bare wood and also held the covering from coming loose.

Try the heat - not too much or you'll burn the epoxy - you'll like how it flows. Also works when glassing a wing.


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Methods to fuel proof firewall - 12/24/2001 3:17:54 AM   
Mike Bell



Posts: 361
Joined: 12/19/2001
From: Bellefontaine, OH, USA
Status: offline 		I have used clear polyurathane with good results when I was out of epoxy. When the plane crashed due to battery failure a few weeks later the firewall survived.
Epoxy thinned a little is still my favorite.

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Methods to fuel proof firewall - 12/24/2001 4:09:06 AM   
Jemo



Posts: 1927
Joined: 12/2/2001
From: in, FL, USA
Status: offline 		Yes, Yes, Epoxy thinned plus the heat gun does a nice light weight job.

I would really like to try Marc's credit card if I can get Him to send it to me.

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I use dope..... - 12/24/2001 2:52:20 PM   
dgrant



Posts: 1075
Joined: 12/3/2001
From: Clovis, CA, USA
Status: offline 		Midwest(formerly Pactra) butyrate dope. Straight on, about 3 coats clear firewall area, inside tank compartment, around nose area of plane, and any other area that might be suspect to seepage, depending on planned exhaust exit. Then usually paint black on firewall, just to leave that finished looked, which it does very well.

It's cheap, works well, very easy to use, the lightest substance available and drys in 30 min or less. Doesn't get easier then that, been doin it like that for over 25 yrs, I can tell you the dope lasts alot longer then planes.

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Methods to fuel proof firewall - 12/25/2001 12:54:09 AM   
Tex Pilot


 

Posts: 44
Joined: 12/16/2001
From: South Central Oklahoma
Status: offline 		Hello and Merry Christmas Marc. I now have started using Koveral and Polyurethane to cover my planes. I really like being able to paint my color schemes and the covering is really durable and light. The polyurethane also makes the plane very fuel and water proof. We use this method for our sea planes also. Once you do this........ you will be spoiled for life. You will never use iron on film again. JMHO Tex

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